I think 10 days is the most. Like i've always said, i've passed pits 4 or 5 times with a fairly loud car with no signs of cats or anything.

Only the last time it was bought up and that was a sound issue (hence the silencer)

So in MY PERSONAL experience at warwick, 80% of the time they couldnt give a shit about the cat. I'd chance it. Whats worse can happen. 10K fine which never happens.

I reckon your more likely to face jail time for downloading shit online than a 10K no cat fine!